One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,16)(12,14)(13,15)(17,18)(19,24)(20,27)(21,25)(22,31)(23,26)(28,30)(29,32) involution — undirected(2,5)(6,8)(11,12)(14,16)(17,19)(18,24)(20,25)(21,27)(22,29)(23,28)(26,30)(31,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,27,18,23,31,22,26)(19,25,21,24,28,32,29,30)(9,12,13,11)(10,14,15,16)(17,21,23,29)(18,25,26,32)(19,27,28,22)(20,30,31,24)(1,3,4,7)(2,6,5,8)(19,28)(21,29)(24,30)(25,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.